Anything Steve Purcell has worked on. (Old school LucasArts adventure games by the boatload and the current Sam and Max games) I love his wacky style, it translates so well into games it's a damn shame he no longer works for Lucasarts. I haven't downloaded the Monkey Island remake from XBox live because 1. I already own the definitive collectable version on floppy with the dial a pirate wheel and 2. The crappy imitation of the original Purcell cover art pisses me off every time I see it.

Sad it's so small as in the treasure there're luncheon vouchers and stuff. Ah "The Boggit": a classic on the old Spectrum with plenty of sick jokes and dodgy observations about the sexual predilections of Elves...